Physics Questions and Answers
If you want to learn more about the nature and properties of matter and energy or you're simply preparing for a Physics exam, these Physics past questions and answers are ideal for you.
If you want to learn more about the nature and properties of matter and energy or you're simply preparing for a Physics exam, these Physics past questions and answers are ideal for you.
0.52cm3
1.42cm3
1.87cm3
5.22cm3
14.22cm3
Correct answer is B
No explanation has been provided for this answer.
2.4:1
2.0:1
1.2:1
1.0:1
1.0:2
Correct answer is D
No explanation has been provided for this answer.
6cm3
4cm3
3cm3
2cm3
1cm3
Correct answer is A
P\(_1\)V\(_1\) = P\(_2\)V\(_2\)
When the bubble comes to the surface and pressure drops 3 times, the volume increases 3 times.
V\(_2\) = 3 x 2
= 6 cm\(^3\)
90oC
80oC
50oC
40oC
30oC.
Correct answer is A
Final Temperature = \(\frac{m_1 T_1 + m_2 T_2}{m_1 + m_2}\)
where m\(_1\) and m\(_2\) are the weights of the water in the first and second containers.
T\(_1\) and T\(_2\) are the temperatures of the water in the first and second container.
Given Final temperature = 50°C;
Let m\(_1\) = b, then m\(_2\) = 2b.
T\(_1\) = t; T\(_2\) = 30°C
\(\therefore 50 = \frac{b(t) + 2b(30)}{b + 2b}\)
\(50 = \frac{bt + 2b(30)}{3b}\)
\(50(3b) = bt + 2b(30) \implies 150b = b(t + 60)\)
\(150 = t + 60 \implies t = 150 - 60 = 90°C\)
0oC
2/9oC
4/9oC
9/4oC
9/2oC
Correct answer is C
No explanation has been provided for this answer.